org.apache.cassandra.db.partitions

Class AtomicBTreePartition

java.lang.Object

org.apache.cassandra.db.partitions.AbstractBTreePartition

org.apache.cassandra.db.partitions.AtomicBTreePartition

All Implemented Interfaces:

java.lang.Iterable<Row>, Partition

public class AtomicBTreePartition
extends AbstractBTreePartition

A thread-safe and atomic Partition implementation. Operations (in particular addAll) on this implementation are atomic and isolated (in the sense of ACID). Typically a addAll is guaranteed that no other thread can see the state where only parts but not all rows have been added.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.partitions.AbstractBTreePartition

AbstractBTreePartition.Holder, AbstractBTreePartition.SliceableIterator, AbstractBTreePartition.SlicesIterator

Field Summary

Fields

Modifier and Type	Field and Description
static long	EMPTY_SIZE

Fields inherited from class org.apache.cassandra.db.partitions.AbstractBTreePartition

EMPTY, metadata, partitionKey

Constructor Summary

Constructors

Constructor and Description
AtomicBTreePartition(CFMetaData metadata, DecoratedKey partitionKey, MemtableAllocator allocator)

Method Summary

Modifier and Type	Method and Description
long[]	addAllWithSizeDelta(PartitionUpdate update, OpOrder.Group writeOp, UpdateTransaction indexer) Adds a given update to this in-memtable partition.
protected boolean	canHaveShadowedData()
protected AbstractBTreePartition.Holder	holder()
boolean	usePessimisticLocking()

Methods inherited from class org.apache.cassandra.db.partitions.AbstractBTreePartition

build, build, build, columns, deletionInfo, getRow, hasRows, isEmpty, iterator, lastRow, metadata, partitionKey, partitionLevelDeletion, rowCount, searchIterator, sliceableUnfilteredIterator, sliceableUnfilteredIterator, staticRow, stats, toString, unfilteredIterator, unfilteredIterator, unfilteredIterator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

EMPTY_SIZE

public static final long EMPTY_SIZE

Constructor Detail

AtomicBTreePartition

public AtomicBTreePartition(CFMetaData metadata,
                            DecoratedKey partitionKey,
                            MemtableAllocator allocator)

Method Detail

holder

protected AbstractBTreePartition.Holder holder()

Specified by:

holder in class AbstractBTreePartition

canHaveShadowedData

protected boolean canHaveShadowedData()

Specified by:

canHaveShadowedData in class AbstractBTreePartition

addAllWithSizeDelta

public long[] addAllWithSizeDelta(PartitionUpdate update,
                                  OpOrder.Group writeOp,
                                  UpdateTransaction indexer)

Adds a given update to this in-memtable partition.

Returns:

an array containing first the difference in size seen after merging the updates, and second the minimum time detla between updates.

usePessimisticLocking

public boolean usePessimisticLocking()